Question An alcohol evaporator in an air brake system: Answers Makes the brakes work without squeaking. Prevents ice from forming in the braking system. Lubricates parts of the braking system. Explanation Some air brake systems include an evaporator that introduces alcohol into the system. The alcohol can help prevent ice from forming within the system. Take a FREE Practice Test Now This questions appears in the following tests: Florida Knowledge Test Class A , Alabama Air Brakes , Montana Air Brakes , South Carolina Air Brakes , Virginia Air Brakes ,